/usr/lib/python3/dist-packages/sklearn/tests/ is in python3-sklearn 0.17.0-4.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/python3/dist-packages/sklearn/tests/__init__.py
/usr/lib/python3/dist-packages/sklearn/tests/test_base.py
/usr/lib/python3/dist-packages/sklearn/tests/test_calibration.py
/usr/lib/python3/dist-packages/sklearn/tests/test_check_build.py
/usr/lib/python3/dist-packages/sklearn/tests/test_common.py
/usr/lib/python3/dist-packages/sklearn/tests/test_cross_validation.py
/usr/lib/python3/dist-packages/sklearn/tests/test_discriminant_analysis.py
/usr/lib/python3/dist-packages/sklearn/tests/test_dummy.py
/usr/lib/python3/dist-packages/sklearn/tests/test_grid_search.py
/usr/lib/python3/dist-packages/sklearn/tests/test_init.py
/usr/lib/python3/dist-packages/sklearn/tests/test_isotonic.py
/usr/lib/python3/dist-packages/sklearn/tests/test_kernel_approximation.py
/usr/lib/python3/dist-packages/sklearn/tests/test_kernel_ridge.py
/usr/lib/python3/dist-packages/sklearn/tests/test_learning_curve.py
/usr/lib/python3/dist-packages/sklearn/tests/test_metaestimators.py
/usr/lib/python3/dist-packages/sklearn/tests/test_multiclass.py
/usr/lib/python3/dist-packages/sklearn/tests/test_naive_bayes.py
/usr/lib/python3/dist-packages/sklearn/tests/test_pipeline.py
/usr/lib/python3/dist-packages/sklearn/tests/test_random_projection.py